wppaste
WordPress

get_search_link( string $query = '' ): string

Since
3.0.0
Source
wp-includes/link-template.php:1184
Retrieves the permalink for a search.

Compatibility

WordPress
since 3.0.0
PHP
7.4–8.6-dev
  • 6.7.7
  • 6.8.8
  • 6.9.7
  • 7.0.4
  • 7.1.0

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$querystringoptional
The query string to use. If empty the current query is used. Default empty.Default: ''

Return value

string
The search permalink.

Performance profile

How much work a call to get_search_link() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class
Trivial

Touches nothing outside its own arguments.

Scaling
Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions
28–37

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 50.

Plugin surface
1 hook

Third-party callbacks on 'search_link' run inside this call, and their cost is not bounded by anything here.

Called by
1

1 place in core call this, so the cost is paid more often than your own code shows.

What it touches

  • hookthird-party callbacksapply_filters()called directly

Further down the call graph this can also reach option, cache, serialize, query and transient. Those are the worst case, several calls deep and usually down an error path, not what a normal call pays.

What one call costs · 4 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost get_search_link() can have, taken from its control-flow graph on PHP 8.5.

WhenInstructionsCalls it makes
!empty($query) && empty($permastruct)28stripslashes(), ->get_search_permastruct(), urlencode(), home_url(), apply_filters()
empty($query) && empty($permastruct)29get_search_query(), ->get_search_permastruct(), urlencode(), home_url(), apply_filters()
!empty($query) && !empty($permastruct)36stripslashes(), ->get_search_permastruct(), urlencode(), user_trailingslashit(), home_url(), apply_filters()
empty($query) && !empty($permastruct)37get_search_query(), ->get_search_permastruct(), urlencode(), user_trailingslashit(), home_url(), apply_filters()

Across PHP versions

PHPCompiledExecutedBranchesNotes
8.6-dev5028–372
8.55028–372
8.45028–3727 fewer instructions than PHP 8.3
8.35728–442
8.25728–442
8.15728–442
7.45728–442

An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.

Hooks and filters fired · 1

One hook fires while get_search_link() runs, in this order:

  1. apply_filters( search_link )filterline 1212 (+28 into the body)

    Filters the search permalink.

Uses · 4

  • get_search_query()Retrieves the contents of the search WordPress query variable.
  • home_url()Retrieves the URL for the current site where the front end is accessible.
  • user_trailingslashit()Retrieves a trailing-slashed string if the site is set for adding trailing slashes.
  • apply_filters()Calls the callback functions that have been added to a filter hook.

Used by · 1

Source code

View on Trac View on GitHub 

function get_search_link( $query = '' ) {	global $wp_rewrite; 	if ( empty( $query ) ) {		$search = get_search_query( false );	} else {		$search = stripslashes( $query );	} 	$permastruct = $wp_rewrite->get_search_permastruct(); 	if ( empty( $permastruct ) ) {		$link = home_url( '?s=' . urlencode( $search ) );	} else {		$search = urlencode( $search );		$search = str_replace( '%2F', '/', $search ); // %2F(/) is not valid within a URL, send it un-encoded.		$link   = str_replace( '%search%', $search, $permastruct );		$link   = home_url( user_trailingslashit( $link, 'search' ) );	} 	/**	 * Filters the search permalink.	 *	 * @since 3.0.0	 *	 * @param string $link   Search permalink.	 * @param string $search The URL-encoded search term.	 */	return apply_filters( 'search_link', $link, $search );}

Changelog

Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.

  1. 6.7.7
  2. 6.8.8
  3. 6.9.7
  4. 7.0.4
  5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data
Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/link-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.
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